Process (and apparatus) for chamfering the sharp edges of small plates of a lining



Oct. 29, 1935. G. DEsAGN-r PROCESSs (AND APPARATUS) FOR CHAMFERING THE SHARP' 'EDGES 0F SMALL PLATES 0F A LINING Filed May 28. 1934 2 Sheets-.Sheet 1 Oct. 29, 1935. G. DESAGNAT 2,019,398

PROCESS (AND APPARATUS) FOR CHAMFERING. THE n SHARP EDGES OF SMALL PLATES OF A LINING Filed May 28, 1934l 2 Sheets-Sheet 2 listened oet. 29, 193s PATENT oFFlcE raocnss (AND APPARATUS) Foa cnam- FEBJNG THE SHARP EDGES F PLATES 0F A LINING SMALL Gaston Dsagnat, Paris, France Application May 2s, 1934, serialvNo. 728,641 In France June 1, 1933 This invention has for its object an improvement to wall or similar linings which in known manner comprise abutted plates rigidly arranged to suit the use contemplated and glued on a back- 5' ing made of such sheet material 0 tive material with a diamond after gluing said sheet on the backing.

Now, when particularly opal glass is usedfor the production of such linings, it is not possible to obtain the glass in sheets of uniform thickness; consequently, differences appear in the thicknesses of the plates, which can but deteriorate the appearance of the lining; particularly when the latter is illuminated with skimming light these diierences in thickness will produce shadows by which they will be brought out and even amplified and whereby' the appearance of the lining will be even more irregular than its real one. i

According to this invention the inconvenience mentioned above is overcome in that the edges of the plates are so chamfered that instead of the joint between adjacent plates being limited by plain and substantially abutting edges of which the leastdifferences in thickness are amplied, it is limited by widened edges between which a sumcient space is provided to ensure that said unequalities will no longer be visible and will not produce shadows by which they would be brought out.

The edges by virtue of their slope are visible and meet at about themiddle of their thickness, so that notwithstanding the gap therebetween at the outside thereof they will not uncover the backing and will not create voids in the lining. On the contrary they will in some respects form moldings that add to the decorative appearance I of the lining.

Another advantage is that the chamfers suppress the sharp edges and corners produced by the cutting and on which one may have his skin excoriated or cut by passing his hand on the Cleaning is also facilitated, as the joints with flaring edges are accessible more conveniently and the dust settled therein can be wiped away easily; moreover, the edges and corners of the joints cannotretain or tear'away the wiping rags. It is also to be noted that, as a resulto! the slope uf the joint edges, water cannot stay therein and tot the An embodiment of the lining according to this invention and of a. device for producing the same will now be described, reference being had to the drawings appended hereto by way of example and in whichz- Figure 1 is a perspective view of the lining.

Figure 2 is.an elevational view of a joint chamfering device.V

Figure 3 is a corresponding plan view.-

Figure 4 is a fractional elevational view of a 10 modiiication of the device.

The lining is made in known manner of a rigid sheet of decorative material glued onl a swanskin or knitting or like backing I and cut into abutting plates 2.

4 l5 According to the invention, the edges of the said plates are chamfered on a certain depth so that bevels 2a are formed which meet at theirl lower portionsand between which such a space e is provided on a level with the lining surface 20 that height differences between the plates shall not be visible.

The invention moreover provides a device adapted easily and quickly to produce perfectly regular bevels having the exact depth and width desired. A

After cutting. up the plates 2 the lining is laid yon a prism-shaped support 3 rotatable about a shaft B so that the line of the joint to be chamfered registers with an edge A of the said sup- 80 port and that the rows of plates adjacent to said line rest on the two adjacent faces F1, F2 of the support, on which they may be retained by clamping means 5. The two edges of the joint line bearing on the edge A thus are pulled apart and 85 v the sharp edges of the plates 2 -are set out.,

Said edges then are ground away by means of a flat grinding wheel 6 that is laid thereon and traversed lengthwise of the joint line.

Said grinding wheel for instance is fulcrurned 40 universally onv the shaft 1 of a miniature electric motor 8 which in turn' is secured to a bracket 9.

In the case of low output plants the bracket 9 may be arranged in. a slide l0 in the framework Il, the grinding wheel being traversed by hand 45 along the joint line to be chamfered, by moving vthe bracket in the said slide with the aid of a handle l2. l

The angle between faces F1, F2 of the support is suitably chosen in order that when the lining 5o reassumes its normal shape the desired angle a shall be obtained between the facets or chamfers 2a produced by the wheel 6. j According to a particular arrangement the width or races Fi, F2, of the support correas' chamfers 2a are ground along a joint line it is only necessary' to swing the support 3 about its shaft 4 e. g. in the direction of the arrows F to bring another edge A' thereof under the wheel 6; by virtue of the arrangementdescribed the said edge A' holds up another plate joint line to the wheel and it is only necessary to repeat the operation already described on the said joint line.

If the plate width is a submultiple of that of faces F1, F2, e. g. one half thereof, one joint out of two will be chamfered as described, Whereafter the lining may be shifted by hand by the width of one plate in order to bring a still unchamfered joint line in register with an edge, the operation then being repeated to chamfer the joints left at the first grinding operation.

A device for a large output plant is shown in Fig. 4.

In this case the movement of the bracket 9 supporting the wheel is produced by a motor I3, e. g.'by means of a nut and spindle gear I 4,- the bracket being kept vertical by a roller I5 engaging the underside of a guide rail i6.

The drive will be arranged to allow the bracket being moved in one direction then in the other so that the reversing may take place when the wheel reaches one end of a joint line. Such reversin may if desired be produced automatically, as wel as the shifting of support 3, e. g. by shifting members actuated by the bracket at the end of its travel.

It will be understood that the device described, although a preferred one,is by no means compulsory and that any machine suitable forthe production of such chamfered plate linings may be used without thereby departing from the invention; for instance, instead of using a flat wheel and a support arranged to open -the joints between the plates a bevelled wheel may be used; the device may also be arranged in such manner that it can operate cn other than straight joint lines, etc.

If, in particular, a lining constituted by plates 'made of wood, or fibrous material is treated, it

will first be convenient to form the bevels by means of a grinding wheel cut on a bevel, of a plane, or of a rotating wheel, and only subsequently to divide the plate into small plates, by simple pressure, by taking advantage of the starting point formed by the bevel. A lining is thus obtained which can very advantageously replace floor, owing to its low cost price, its strength, and the ease with which it 2,019,398 'spends to that of the plates 2, so that after the' can be cleaned, simple sweeping with a broom in the bevel allowing to clear the dust which may have entered therein.

I claim:

1. A process for chamfering the sharp edges 5 y of small plates of a lining composed oi' a flexible substratum on which is glued a rigid plate whichy has been cut out on said substratum into small rectangular elements after it has been glued in position, which consists 'in folding this lining 10 rearwardly according to each joint line of the' rows of small adjacent edges are angularly spaced apart, and'in cutting said edges according to faces aligned according to one and the same plane.

2. An apparatus for carrying out the procl5 ess according to claim l comprising a support in the shape of a dihedron, means whereby a pair of -linin'g portions located on either side of a plate joint line are pressed on the corresponding pair of faces of the said dihedron, a grinding wheel 20 in front of the edge of said dihedron adapted to produce chamfers on the outer plate sides adjacent to the said joint line when the lining is laid on the dihedron with its plates facing outward and means to traverse the wheel along the .25 edge of the dihedron. n

3. An apparatus for carrying out the process according to claim 1 comprising a support in the shape of a dihedron having the same angleof aperture as the angle to be given to the cham- 30 fers of two adjacent plates means whereby a pair of lining portions located Ion either side of a plate joint line are .pressed on the corresponding pair of faces of the said dihedron, a grinding wheel in front of the edge of said dihedron 35 adapted to bear with a straight portion on the outer plate sides adjacent to the said joint line when the lining is laid on the dihedron with its plates facing outward and means to traverse the Wheel along the edge of the dihedron. o 4. An apparatus for carrying out the process according to claim l comprising a prism-shaped support of which the face width bears a whole vnumber ratio to face width, a wheel in front of 

